Citations.

Encyclopedia. 26th February 2008.

< http://www.encyclopedia.com/doc/1E1-iodine.html>.
Environmental Chemistry. 27th February 2008.
< http://environmentalchemistry.com/yogi/periodic/I.html>.
Lenntech. 29th February 2008.
< http://www.lenntech.com/Periodic-chart-elements/I-en.htm>.
Science Clarified. 29th February 2008.
< http://www.scienceclarified.com/everyday/images/scet_01_img0037.jpg>.
Web Elements. 27th February 2008.
< www.webelements.com/webelements/ elements/text/I/key.html>.